Third to charles h



(ModeL) D. A. RAGAN.

SEAL TRIAP. No. 245,213. Patented Aug.2, 1-881.'

IIIIIIIIIIIH W1; NESSES. [NVENTOR/ M -7% A I v M TTOR UNITED STATES PATENT OFFICE.

DENNIS A. nAe v; on PHILADELPHIA, PENNs Lv uIA,Ass1eNoR OF one THIRD TO CHARLES-H. GRAHAM, OF SAME PLAoE.

SEAL-TRAP.

SPECIFICATION forming part. of Letters Patent No. 245,213, dated August 2, 1881. Application filed February 3, 1881. (Model.)

To'all'whom it may concern:

Be it known that I, DENNIS A. RAGAN, a cilizen of the United States, resident of the city of Philadelphia, in the county of Philadelphia 5 and State of Pennsylvania, haveinvent-ed certain new and useful Improvements in Seal- Trap Joints for Wash-Basins, &c., of which the fgllowingis a specification, reference bein g had to the accompanyingdrawings, where- Figure 1 is a vertical section of a seal-joint trap embodying my improvements. Fig.2 is an elevation of the same. Figs. 3 and 4 are elevations, partly in section, showing slight 5 modifications in the construction of the cover or cap fastening of the seal-joint trap and Figs. 5 and 6 are, respectively, a plan and an. elevation of the mercury trough or bowl and strainer.

My invention has for its object to provide a device for preventing the passage of sewer-gas through the waste-pipes of wash-stands, &c., in which the seal sh all be composed of mercury and water.

My invention has for its further object to provide means for preventing the mercury-seal from becoming fouled or rendered ineffective by the admission to or lodgment in it of hair, pieces of paper, seeds, or other solid objects passing through the pipe.

A still further object of my invention is to provide means whereby access may be had to the trap with which the seal. connects or of which it forms a part,for the purpose of clean- 5 ing the same.

Referring to the accompanying drawings,A

indicates the waste-pipe of a wash-stand or other like fixture. V

B represents a trap (which may be an S or 40 a P orother form of trap) located therein.

0 represents a bowl fitted in one of the branches of said trapand provided with acap, E, said cap being designed to be made of glass, so as to permit inspection of theinterior of the 4 5 trap Without removing the cap. Said cap rests on the upper edge of the bowl and fits inside of the outer wall, I), of the trap, thus forming a top for the latter. It is secured in position by a composition joint, or by a screw, or preferably by a clampingband, F, having a tightening-screw, f, which permits its removal when required. Said band may encircle the pipe A, as shown in Figs. 1 and 2, or only the branch I) of the trap B, as shown in Fig. 3.

The bowl isof the peculiar shape shown, its upper edge, 0, affording a seat for the cap E, while the Wall 0 is formedwith an opening, 0 or passage-way to branch I) of the trap 13. Said bowl is formed with an internal annular groove or channel, 0 which forms a receptacle for mercury.

D is a disk or valve having a depending annular flange, d, which is designed to dip in the groove 0 and form a seal-joint with the mercury contained in said groove. Said disk D has a stem, d, which slides in a central open ing, 9, in a fixed strainer, G, fitted inside the inner wall of thegroove c Said strainer is designed to be made of brass or to have a brass bushing, so as to prevent corrosion between it 0 and the valve-stem d.

H is a clear-out opening in the bottom of the trap B, provided with a screw, h.

The operation is as follows: The parts being arranged as shown, the flange d dipsinto 5 the mercuryin the groove 0 and forms a mercury. seal which will effectually prevent the passage of sewer-gas through the trap. The water in the latter below the mercury also forms a seal, re-enforcin g. the action of the mer- 8o cury or forming a double seal. When the Water in the pipe A rises sufficiently it will lift the valve D-a-nd escape through the branch I) of the trap, said valve sealing again in the mercury when the water in the pipeAhas lowcred sufliciently to permit it. The strainer G prevents any solid matter of sufficient size to foul the mercury to pass into the groove 0. When desired, the strainer and trap may be cleaned by removing the cap E or the screw h in the clean-out opening H.

The trap B is designed to be in one piece with the pipe A and formed of lead, thus permitting the formation of a wipe-joint where a connection is required and dispensing with 5 screw-couplings. The bowl 0 is designed to be an iron casting, which will avoid the amalgamation of the mercury therewith.

What I claim as my invention is as follows:

1. In combination with the bowl 0, having I00 mercury-groove 0 the disk or valve 1), having cap E, valve 1), having flange (I and stem d, depending flange d and stem d, substantially and strainer G,substantially as shown and deas shown and. described. scribed.

2. In combination with bow! O,having mer- In testimony that I claim the foregoing I 5 enry-groove a", and valve 1), having stein d, have hereunto set my hand this 2d dayof Feb- 15 the strainer G, affording a bearing for said ruary, 1881.

stem and protecting said groove from fouling, DENNIS A. RAGAN. substantially as shown and described. Witnesses:

3. The combination, with lead pipe A, of JOHN RODGERS,

to trap B,iron bowl O,hnving mercury-groove 0 S. J. VAN STAVOREN. 

